Her full name is Billie Eilish Pirate Baird O’Connell.
Her brother and mother are songwriters, and her father is skilled in playing the piano and ukulele.
Collaborating primarily with her brother Finneas, Billie co-writes most of her songs.
She began her musical journey by joining the Los Angeles Children's Chorus at the age of eight.
Billie started writing songs when she was just eleven years old.
Her debut single, "Ocean Eyes," was released on SoundCloud in 2016.
Although she was passionate about dance and took classes as a child and teenager, her dancing career was cut short due to a bone injury.